| 摘要 |
PROBLEM TO BE SOLVED: To provide a kneading eraser which is lightweight, soft, easily kneaded and excellent in kneading feeling, and has various uses. SOLUTION: The kneading eraser is characterized by compounding sulfur-free factice and hybrid hollow microspheres prepared by coating the surface of a thermoplastic polymer with an inert inorganic powder to a viscoelastic base material. COPYRIGHT: (C)2004,JPO
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